JP2019103858A - Ventilation mask - Google Patents

Abstract

To provide a cardiopulmonary resuscitation (CPR) mask convenient for use during surgery.SOLUTION: Disclosed is a nasal ventilation mask having separate ports integrated therewith in order to monitor end-tidal COexpulsion expelled nasally or orally. Also disclosed is a CPR mask for nose-to-mouth and/or mouth-to-mouth resuscitation, having a body shaped to cover the nose and/or mouth of a victim, the mask including a COabsorber for eliminating at least in part rescuer's exhaled COdelivered to the victim.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the improvement of anesthesia masks and ventilation masks.

  This application is based on US Provisional Application No. 62 / 039,759, filed August 20, 2014, US Provisional Application No. 62 / 078,677, filed November 12, 2014, and May 13, 2015. This application claims the priority of US Provisional Application No. 62 / 161,041, filed on the same day, which is incorporated herein by reference.

  During surgery, the patient is usually anesthetized. The most common delivery systems include a canister containing anesthetic gas and oxygen, a system for regulating gas flow and patient respiration, and the effectiveness of the patient's airway for delivery of respiration, oxygen supply, and anesthetic gas mixture. And a device for securing. The ventilation mask allows the patient to be anesthetized while the patient wakes up from anesthesia if the patient is sedated during surgery or treatment while the patient is being anesthetized before the patient is anesthetized for surgery. To provide oxygen to the patient either during emergencies and / or during selective airway management, including, but not limited to, after waking up from or while the patient needs additional oxygen for any reason Used for

  However, one drawback to mask ventilation is to keep the mask in place, keep the patient in the inspiratory position, keep oxygen and anesthetic gases from leaking into the air, and keep the patient's airway open. The point is that the donor's hand and the patient's face must always be in contact. If the donor does not maintain the patient in the inspiratory position, it can be a dangerous and difficult event known as upper airway obstruction. The reason why the donor must hold and operate the mask continuously is related to the human body structure and physiology. When the muscles of the jaw, tongue and upper airway relax by sedatives and / or muscle relaxants given for sedation and / or anesthesia to the patient, the upper airway (mouth, pharynx, larynx) is partially blocked, It may close completely. When the patient's jaw falls, the tongue occludes the airway and appears as a snoring (partial blockage) or apnea (the oxygen is completely unable to pass from the upper airway to the lungs). Another problem occurs when the donor is not able to manage anesthesia or sedation adequately or when the patient starts to move out gradually. Also in this case, the position of the patient's head and neck may not be in the inspiratory position, and the patient's airway may be similarly blocked. Movement of the patient during surgery is dangerous, especially in eye, ear, nose, neck, head and throat surgery as the surgeon can make mistakes.

  In addition, the patient may suddenly need intubation during surgery. Full-face masks, ie masks that cover the patient's nose and mouth, have problems in emergency situations. This is because the mask must be removed from the patient's mouth during intubation. However, removing the mask will also eliminate the assistance of oxygen. As described below, one aspect of the present invention addresses the above and other issues in the prior art.

  Another aspect of the invention relates to a cardiopulmonary resuscitation (CPR) mask.

  Cardiopulmonary resuscitation, commonly known as CPR, is additionally treated to restore the spontaneous blood flow and respiration of people with cardiac arrest (hereinafter referred to as “subjects” or “victims”) It is an emergency procedure performed manually to protect the function of the brain until it is taken. CPR is also indicated for those who do not respond to breathing, as in the case of a deceased victim or a victim of electrocution, or who exhibit abnormal breathing such as, for example, terminal respiration.

  In CPR, at least 100 chest compressions per minute at a depth of at least 2 inches to create artificial circulation by manually pumping blood into the body through the heart. In addition, the rescuer breathes directly into the subject's mouth or breathes into the subject's mouth and / or nose through the CPR mask (collectively, "mouse-to-mouse resuscitation"), or the subject Breathing may also be provided using devices that deliver air from the mouth and / or nose of the person to the subject's lungs. The process of providing ventilation from the outside is called "artificial respiration". However, it is now strongly recommended that high-quality chest compressions be performed in conjunction with artificial respiration, and that artificial respiration, when combined with high-quality chest compressions, can potentially provide the greatest benefit to the patient. it can.

Conventional CPR masks are configured to be held in place by the hand of the CPR provider or held in place by straps extending behind the subject or victim's head There is. While a CPR mask can help ventilate a non-respiring subject or victim, the rescuer can benefit from the air provided when providing mouse-to-mouse and / or nose-to-mouse resuscitation. , which contains a large amount of CO ₂ that can be called lethal. As described below, in another aspect the invention addresses the above and other problems of the prior art.

The present invention according to one aspect provides an improved ventilation / anesthesia mask which overcomes the aforementioned and other problems in the prior art. More specifically, the nasal ventilation / anesthesia mask includes a ventilation port for supplying oxygen and other gases via non-invasive positive pressure ventilation (NIPPV) during anesthesia and measures end-tidal CO ₂ concentration from the nose Can be connected to an anesthesia circuit, and it can exhale only from the patient's mouth, with one or more offset gas openings that allow the mouth and airway to be clearly seen while the donor is performing direct laryngoscopy and intubation. Subnasal mouth opening for trapping possible anesthetic gases and end exhalation CO ₂ and gas collection / end exhalation CO ₂ opening connected to the inner groove of the mask isolated from the nasal cavity And an oxygen port for supplying oxygen to the patient after surgery. And, for example, for strapping the mask to the patient's head, or operating the mask according to the teachings of co-pending PCT application PCT / US14 / 44934 and co-pending PCT application PCT / US15 / 34277 The mask is completed with a plurality of, preferably three or four, tabs or eyelets for constraining.

In one embodiment of the present invention, there is provided a nasal ventilation mask having an O ₂ port for introducing oxygen into the mask, a ventilation port, and a gas monitoring fitting integrated with or attached to the ventilation port. . In this embodiment, the gas monitoring port includes a luer lock.

In another embodiment of the present invention, an external opening is provided for collecting gas exhaled from the mouth above the patient's lip area and under the nasal area in the mask and having an external opening that opens towards the collection device. A nasal ventilation mask is provided, said mask optionally further comprising a collection line diverting a portion of the exhaled gas to monitor end expiratory CO ₂ concentration, preferably end expiratory CO ₂ concentration monitoring A connector is provided at the point where the line shuts off the collection line, and by bypassing the gas flow efficiently a positive pressure is given to the end expiratory CO ₂ line, whereby the gas is extracted as a sample from the collection line It is characterized by

In such an embodiment, the mask may additionally monitor the exhalation of end-tidal CO _{2 in} the nose and mouth separately by switching between anesthesiologists, or by opening the valves for both simultaneously. If you have a two-way three-port valve for anesthesiologist control and you select an end-tidal CO ₂ concentration monitoring port for the mouth, the end-tidal CO ₂ concentration monitoring line will also collect other ventilation gases during anesthesia. Preferably it is possible.

The present invention also provides a nasal ventilation mask with tabs and eyelets for anterior attachment of the mask with a mask anchor or for back attachment with a conventional anesthetic mask strap, and optionally one or more of the following: Both are characterized.
(A) Only one head strap integrated with the front and back can be attached, and the rear head strap is attached to the mask only, or attached to the mask and then attached to the face, thereby attaching the head and / or neck of the patient To prevent it from moving, or
(B) The patient's head is fixed to the support surface with a head strap, and when the donor changes the head and / or neck angle, the patient's head remains in the desired position and the support surface is desired. Stay in position.

In another embodiment of the present invention, a nasal mask is provided having one or more of the following features.
(A) The mask can be used as an oxygen transfer mask or as a ventilation mask providing O ₂ and anesthetic gas, and at the same time as monitoring end expiratory CO ₂ concentration.
(B) Having ports for monitoring end expiratory CO ₂ concentration through one or more ports that can be used for CPAP before, during, and after surgery.
(C) End-tidal CO ₂ concentration can be monitored through one or more ports, and resuscitation bags allow direct laryngoscopy and intubation without the patient's mouth and airway being blocked by resuscitation bags Having a port that can be connected to
(D) The mask can be attached to the front with a mask anchor or it can be attached to the back with a conventional anesthetic mask strap.
(E) Has an O ₂ port for introducing oxygen into the mask, a ventilation port, and a gas monitoring fixture integrated with or attached to the ventilation port, preferably the monitoring port is a luer Including locks.

  The invention further provides an anesthetic mask having an integrated collection system for collecting anesthetic gas that leaks around the mouth and / or nose.

  In another embodiment, the present invention applies a gas to the patient such that it is attached to the nasal mask and applied to the submandibular space and pressure is applied to press the wearer's tongue against the soft palate to close the space behind the tongue. Jaws that are configured to suppress or prevent leakage through the mouth and allow the patient to breathe in the nose, and if necessary, to release pressure and not disturb breathing while exhaling Provide a strap.

Another aspect of the invention is a CO ₂ absorber for mouse-to-mouse and / or nose-to-mouse resuscitation, which prevents rescuers or donors from respiring CO ₂ exhaled by the victim. To provide an improved CPR mask including: More particularly, the present disclosure provides a CPR mask having a CO ₂ filter or absorber incorporated in the mask, or a mask inlet for absorbing CO ₂ exhaled by a rescuer or donor.

That is, the provided CPR mask for mouse-to-mouse and / or nose-to-mouse resuscitation comprises a body shaped to cover the victim's nose and / or mouth, which the rescuer vomits and delivers to the victim the CO ₂ that is including the CO ₂ absorber to at least partially removed.

In one embodiment, a CO ₂ absorber is applied to the inner surface of the mask.

In another embodiment, the mask comprises a ventilating tube and the CO ₂ absorber is located in the ventilating tube.

  In another embodiment, the mask includes a one way valve and / or straps to hold the mask on the victim's head.

  In one embodiment, the mask is flexible around to fit the victim's face. In such embodiments, the perimeter may include a soft, flexible cell or an elastically deformable foam cushion.

  In another embodiment, the mask has a biological filter incorporated inside the mask or incorporated in a ventilating tube.

In yet another embodiment of the present invention, a CPR mask as described above is provided having one or more of the following features.
(A) A one-way valve is provided.
(B) Includes straps to hold the mask on the victim's head.
(C) The mask further has a flexible perimeter that conforms to the wearer's face, the perimeter preferably including soft, flexible air bubbles or a foam cushion that elastically deforms.

  Further features and advantages of the invention will become apparent from the following detailed description on the basis of the accompanying drawings.

FIG. 1a is a front view of a nasal ventilation mask according to a first embodiment of the invention. FIG. 1 b is a plan view of a nasal ventilation mask according to a first embodiment of the invention. FIG. 1 b is an interior view of the ventilation mask of FIG. 1 a. It is a top view which shows the state which attached the ventilation mask by this invention to the patient's head. It is a top view which shows the state which attached the ventilation mask by this invention to the patient's head. Figure 3 is a view similar to Figure 3a showing the jaw straps attached to the mask; Fig. 3b is a view similar to Fig. 3b showing the chin strap attached to the mask; FIG. 6 illustrates another configuration of a nasal mask having an end-tidal CO ₂ concentration monitor according to the present invention. FIG. 6 illustrates another configuration of a nasal mask having an end-tidal CO ₂ concentration monitor according to the present invention. FIG. 7 is a side view of another configuration of a nasal mask ventilation system according to the present invention. FIG. 6 is a plan view of another embodiment of a nasal ventilation mask having a CO ₂ concentration monitor according to the present invention. FIG. 6 is a plan view of yet another embodiment of a nasal mask with a CO ₂ concentration monitor according to the present invention. 1 is a partial cross-sectional view of a CPR mask according to a first embodiment of the present invention. FIG. 7 is a side view of a second embodiment of a CPR mask according to the invention.

A nasal ventilation mask 10 according to a first embodiment of the invention is shown in FIGS. 1a and 1b. It is optimal to have four gas openings, but it may be less or more than four. The first is a ventilation port 12 that can supply O ₂ and other gases for NIPPV during anesthesia or for a critically ill patient and recover all ex expiratory CO ₂ exhaled from the nose from the patient. The second is the mouth opening 14 isolated from the subnasal nasal cavity and formed by the mask portion on the patient's nose. The purpose of the opening 14 is to capture anesthetic gas and end exhaled CO ₂ exhaled from the patient's mouth. In addition to suppressing or eliminating anesthetic gases from entering the control room and becoming dangerous, it is possible to monitor end expiratory CO ₂ concentrations exhaled from the patient's lungs and leaking out of the mouth. The third opening is a gas collection / end expiratory CO ₂ port 16 connected to the opening by a groove 18 inside the mask (see FIG. 2) isolated from the nasal cavity. Gas containing end-tidal CO ₂ discharged leaves the mask through a port 16, end-tidal CO ₂ concentration monitor 32 takes out the gas collection filter and the gas by the tube 20 as the sample from the gas collection line (see Fig. 3 Led up to). The fourth opening is during anesthesia is closed by a cap, the pre-operative, in either of the latter intraoperative or surgical a O ₂ ports 22 that can be connected to the O ₂ source (not shown). When O ₂ is supplied, the ventilating tube is removed from the venting port 12 so that end expiratory CO ₂ is exhaled from the nose. A gas hood 24 located around the subnasal mouth opening 14 extends beyond the mask as shown. This is an optional provision to further spread the effect of the mouth opening 14 in the mask to take up more gas exhaled from the patient.

  The mask is for attaching a chin strap or head strap as shown below or according to the teachings of our co-pending PCT application PCT / US14 / 44934 and co-pending PCT application PCT / US15 / 34277 It includes three eyelets or tabs 60, 62, 64 or four eyelets or tabs 66, 68, 70, 72 (FIG. 7) for attachment to the operating table.

The interior of the nasal ventilation mask 10 of the present invention is shown in FIG. The ventilation port 12 and the O ₂ port 22 are connected to the nasal cavity 26. The gas exhaled from the mouth passes from the mouth opening 14 on the outer side of the mask through the gas passage 18 and out of the gas collection device and the end expiratory CO ₂ concentration monitoring port 16 to the collection device and the end expiratory CO ₂ concentration It flows to the monitor. The gas passage 18 separates the nasal cavity 26 created by the ventilation mask on the patient's nose and mouth area.

When O ₂ or O ₂ and anesthetic gas are supplied to the patient, through the nasal cavity 26, through the ventilation circuit 28 attached to the ventilation port 12 and through the dotted line 30, the cap shown is O ₂ Seal the port. After surgery, remove the cap 30 from the _{O 2} port 22, supplies _{O 2} to the patient by attaching the _{O 2} line port. Ventilation circuit 28 is removed from the ventilation port 12, a cavity 26 for the nose is released to the atmosphere, end-tidal CO ₂ is discharged from the nose.

Gas circuits for both nasal mask ventilation / end-tidal CO ₂ concentration monitoring, and for an oral gas collector / end-tidal CO ₂ concentration monitoring line are shown in FIGS. 3 a and 3 b. FIG. 3a shows the flow of nasal gas flowing from the ventilation circuit 28 and the nasal cavity 26 connected to the end expiratory CO ₂ concentration monitor 32. FIG. 3b shows that gas exhaled from the mouth enters the mouth opening and flows through the gas collection line to the recovery device 34 and the attached line connected to the collection line to the end expiratory CO ₂ concentration monitor Show the situation. The opening to the collection line should be located at about 90 degrees to the collection gas flow so that the local pressure is higher than if the opening is perpendicular to the gas flow . If it is vertical, the negative pressure makes it impossible to sample the end expiratory CO ₂ concentration monitoring line flow due to the negative pressure gradient.

Reference is made to FIGS. 4a and 4b. Jaw straps 36 are also attached to the nasal mask 10 in the submandibular space, exerting pressure on the tongue against the soft palate, occluding the space behind the tongue and preventing gas from leaking out of the patient's mouth Allow the patient to breathe through the nose. The chin strap 36 can, if necessary, have the function of releasing pressure while exhaling, preventing exhalation from blocking and releasing end expiratory CO ₂ and other gases from the mouth.

In yet another configuration, gas circuits for both nasal mask ventilation and end-tidal CO ₂ concentration monitoring are shown in FIGS. 5a and 5b. This figure shows a two-way, three-port valve 40 connecting the nasal circuit to an end-tidal CO ₂ concentration monitor. The anesthesiologist determines which area to monitor for end expiratory CO ₂ concentration, ie, simultaneously in the nose, mouth area, or both.

A side view of another configuration for nasal mask ventilation and monitoring end tidal CO ₂ emission from the airways of the mouth is shown in FIG. A two-way, three-port valve 40 is pivoted towards the mouth to sample end-tidal CO ₂ .

  Also, the nasal ventilation mask can attach only one head strap combined front and rear, the rear head strap can be attached only to the mask or by attaching it to the mask and then attaching it to the surface It can prevent the head and / or neck from moving. By fixing the patient's head with a head strap and supporting the surface, when the donor changes the angle of the head and / or neck, the patient's head stays in the desired position and the support surface is desired Stay in position.

FIG. 7 illustrates yet another embodiment of the present invention providing oxygen to a patient via an O ₂ line connected to an O ₂ port on a ventilation mask. The exhaled gas is exhausted to the atmosphere through the ventilation port 12 as shown in FIG. If the patient is unconscious by anesthesia, the surely discharge the CO ₂ is desirable. This can be accomplished by the addition of a "T-shaped" gas monitoring fixture 50 that slides over the mask ventilation port 12. The body of the cylindrical attachment 50 discharges the exhaled gas to the atmosphere. On the side of the fixture, a cylindrical opening 52 opens at a nominal 90 degree angle to the side. The end of this opening 52 is a luer lock or other type of fixed connection. The gas discharged from the main flow can be sampled through this opening if the gas monitoring line 54 connected to the gas monitor is attached to the interface of the gas monitoring line.

Another way to accomplish the gas sampling function in the same way is shown in FIG. The gas monitoring line interface is an integrated element of the mask ventilation port 12 in this embodiment. In this configuration, O ₂ flows into the O ₂ port through the supply line. Then, the exhaust gas escapes to the atmosphere through the ventilation port 12. On the side of the ventilation port 12, a cylindrical opening 56 opens at a nominal 90 degree angle to the side. The end of this opening may be a luer lock or any other type of fixed connection. If a gas monitoring line connected to the gas monitor is attached to the surface of the gas monitoring line, the gas discharged from the main flow can be sampled through this opening.

  Please refer to FIG. A first embodiment of a CPR mask acting on a CPR procedure requiring artificial respiration, mouse-to-mouse resuscitation or other emergency breathing assistance according to another aspect of the invention is shown at 110. The mask 110 is shaped to cover the victim's nose and / or mouth and has a soft and flexible perimeter 112 that deforms along the victim's face when attached with moderate force and the mask adheres tightly Do. Generally, the mask perimeter 112 includes soft, flexible air bubbles 114 or includes an elastically deformable foam cushion or the like.

  The ventilating tube 116 projects from the mask to which air is supplied, from which it is attached to an integral suction port 118 which allows the rescuer to supply air and which can be evacuated. Ventilation tube 116 or suction port 118 generally has a one-way valve 120 configured to allow air to enter the mask through tube 116. Ventilation tube 116 and its associated valve 120 may be integrally formed with port 118 or may be a replaceable, disposable element or package (FIG. 10).

The inner surface 122 of the mask 110 is partially coated with a CO ₂ absorbent such as activated carbon or zeolite. Also, certain minerals such as serpentine may be advantageously employed. Generally, these materials are sized to an optimal size and are encased within the filter material 124 bonded to the inner surface 122 of the mask 110. Alternatively, the inner surface 122 of the mask 110 may be covered with a CO ₂ absorbing polymer such as polyethylene imine, including fumed silica, as reported on Scientific American, p. 33, Jan. 6, 2012. May be

Alternatively, as shown in FIG. 10, a CO ₂ filter 126 containing a CO ₂ absorbent may be integrated into the ventilation pipe 116.

In use, the rescuer places the CPR mask 110 on the victim's nose and / or mouth to begin emergency ventilation of the victim. The rescuer exerts a moderate force to approximate the victim's face and ventilation is provided by the rescuer exhaling into the ventilation tube 116. Although the effluent from the rescuer contains CO _2, most of the CO ₂ is removed by CO ₂ filter material.

The mask 110 may be formed in different sizes to correspond to differences in face size such as, for example, adult size, youth size, child size, and the like. Characteristics and advantages of CPR mask of the present invention is that be reduced significantly the amount of CO ₂ applied to the victim. Also, masks can save both the victim and the rescuer, so that they can not get sick in an emergency situation.

  In the above invention, various modifications can be made without taking its spirit and scope. For example, a biological filter (shown as a dashed line at 130 in FIG. 10) may be incorporated into the mask or ventilating tube 116. Additionally, the mask may have straps 132 for securing the mask to the victim's head, which eliminates the need for the rescuer to have to press the mask against the victim's face. Other changes are also possible.

10 nasal ventilation mask 12 ventilation port 14 gas collection and CO ₂ concentration monitoring port 16 gas collection and CO ₂ concentration monitoring port 22 0 ₂ port 24 gas hood

Claims (16)

It has a body that forms a nasal cavity with an interior configured to cover the patient's nose without covering the patient's mouth, and has an O ₂ port, a ventilation port, and an end expiratory CO ₂ port Said O ₂ port is for introducing oxygen into the interior of the mask, said ventilation port is fluidly connected to said nasal cavity, and said end expiratory CO ₂ port is of the nasal region of said mask The lower opening is connected to the outer opening and is configured to overlap the lip area of the patient,
A nasal ventilation mask characterized in that the external opening is configured to collect gas exhausted from the mouth of the wearer. The mask is configured to be used as an oxygen transfer mask or as a ventilation mask providing O ₂ and an anesthetic gas, and an end expiratory CO ₂ concentration monitor is configured with a 2-way, 3-port valve, either simultaneously or sequentially The nasal ventilation mask of claim 1, wherein the nasal ventilation mask is configured to monitor end expiratory CO ₂ concentration.   The nasal ventilation mask according to claim 1 or 2, wherein the mask is used for CPAP before surgery, during surgery, and / or after surgery.   The mask is characterized in that the mask is configured to be connectable to the resuscitation bag so as to allow direct laryngoscopy and intubation without the patient's mouth and airway being blocked by the resuscitation bag. The nasal ventilation mask according to any one of claims 1 to 3.   5. A nasal ventilation mask as claimed in any one of the preceding claims, wherein the mask comprises a gas monitoring fixture integral with or attached to the ventilation port. In addition, an anesthesiologist-controlled two-way three-port valve is provided which allows the anesthesiologist to monitor the nasal and oral end-tidal CO ₂ concentrations separately and the nasal and oral end-tidal CO ₂ The method according to any one of claims 1 to 5, characterized in that the concentration monitoring can be switched at the same time, and that monitoring of end-tidal CO ₂ concentration in the mouth is selected to monitor the ventilation gas discharged by the patient from the mouth. Nasal ventilation mask as described in. The nasal ventilation mask according to any one of claims 1 to 6, wherein the mask further includes a collection line for diverting at least a part of the collected gas to an end exhalation CO ₂ monitor. A connector is provided where the end expiratory CO ₂ monitoring line shuts off the collection line, diverting the gas flow and providing positive pressure to the end expiratory CO ₂ line, whereby gas is sampled as a sample from the collection line The nasal ventilation mask according to claim 7, characterized in that it is extracted.   9. A nasal ventilation mask as claimed in any one of the preceding claims, further comprising one or more head straps for holding in position on the patient's nose as an anesthesia mask. Has tabs and eyelets for front mounting of the mask with mask anchors, or back mounting with conventional anesthetic mask straps,
(A) It is configured to accommodate the integrated front and rear head straps attached only to the mask, or to the mask and support surface, and to hold the patient's head and / or neck stationary. ;
(B) Fixing the patient's head on the support surface with a head strap, and the desired position of the patient's head and the support surface even if the donor changes the angle of the patient's head and / or neck Configured to stay in;
The nasal ventilation mask according to any one of claims 1 to 8, characterized in that it has one or both of them. As oxygen transport masks, or as O ₂ and ventilation mask providing anesthesia gas, and can be used as to monitor the end-tidal CO ₂ concentration, a nasal ventilation mask according to any one of claims 1 to 10.   The mask is characterized in that the mask is configured to be connectable to the resuscitation bag so as to allow direct laryngoscopy and intubation without the patient's mouth and airway being blocked by the resuscitation bag. The nasal ventilation mask according to any one of claims 1 to 11.   13. A nasal ventilation mask according to any of the preceding claims, wherein the mask is attachable to the front with a mask anchor or to the rear with a conventional anesthetic mask strap.   14. A nasal ventilation mask according to any of the preceding claims, wherein the mask comprises an integrated collection system for collecting anesthetic gases leaking around the patient's mouth and / or nose.   The gas is not leaked from the patient's mouth by attaching it to the mask, applying it to the patient's submandibular space, and applying pressure to press the patient's tongue against the patient's soft palate to close the space behind the tongue. The mask is configured with chin straps that are configured to let the patient breathe in the nose as well as suppress or prevent, and if necessary, release pressure to prevent breathing while breathing out. The nasal ventilation mask according to any one of claims 1 to 14, characterized in that it comprises. The end tidal CO ₂ port is connected to the end-tidal CO ₂ concentration monitor, nasal ventilation mask according to any one of claims 2 to 15 wherein the ventilation port is characterized in that it is connected to the ventilator circuit.

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